Found these game pieces on eBay. They're from the IJ version of the board game Life. Got them for a few bucks shipped.
I drilled out the bottom of the grail and stones to be able to fit some LEDs inside. I carefully cut the ark open with a hobby knife and glued the lid on skewed. With the help of pinsiders i was able to make a board and a small test harness to make sure they flashed correctly with the jackpot lights. I had to use what was on hand so as of finishing the prototype last night, I didn't have an led on hand that I could fit under the grail. I just glued it on top to be able to show off the concept